The Ultimate Masturbation
アルティメットマスターベーション しごきの山
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The Ultimate Masturbation
A straight graduate student goes to the masturbation camp in the mountains held by the "gay masturbation charisma", where all sorts of masturbation techniques are tried out by participants. One day, the student is raped by a gay guy at the camp, and he starts to question his belief in masturbation.
